The problem is in finding a datasheet which gives you a genuine value for Cg1a. Cg1g2 may also be hard to find, but is probably less important.

Cg1-a is very small in pentodes, and Cg1-g2 is typically 20-30% more than the Cg-a of a comparable triode. With a pentode, g2 becomes part of the anode and is multiplied in the Miller effect.
cheers,
Douglas

Cgk = 14.5 (also listed as input C) so I am assuming Grid 1 to cathode
Cak = 7 (internal capacitance of plate to cathode)
Cga = 0.12 grid to plate
I found spec that shows the capacitance of G2 to Cathode including the capacitor is approximately 65pf

G3 is tied to the cathode.

So, with these numbers what do I do?

G2 tied to the plate and is part of the load so where does the 65pf fit in? Ignored correct?
Cak also load it is ignored also?

Do I ignore the G1 to G2 capacitance or make one up?

so if I take the Cga and double it (for parallel) and multiply by 10 (gain 9 +1)
I get 24pf
Then add twice the Cgk = 29pf I get 53pf??